Array Destructuring: Default and Parameters Values
Explore how to use array destructuring in JavaScript to assign default values and extract parameters directly from arguments. Understand how to swap variables without temporary storage and capture remaining elements with the rest operator. This lesson enhances your ability to write concise and clean code by leveraging destructuring in diverse scenarios.
We'll cover the following...
Providing a default value
When we asked for an extra value to be extracted, we got undefined. Although JavaScript is powerful, it won’t magically create values for positions that don’t exist—but you can.
Remember, from the Defining Default Values for Parameters lesson, a parameter picks up a default value if the argument is undefined. We can apply this feature here to substitute a default value if the value being extracted is ...